CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Cash Flows From Operating Activities:
Net loss	$ (15,655)	$ (15,680)
Adjustments required to reconcile net loss to net cash used in operating activities:
Stock-based compensation	1,870	1,732
Amortization of premium or discount on marketable securities	(1,393)	0
Unrealized losses on cash equivalents	(1)	0
Changes in operating assets and liabilities:
Trade receivables, prepaid expenses and other assets and operating lease right-of-use assets	(4,124)	525
Trade payables, accrued expenses, employee related obligations and other long-term liabilities	2,909	(1,629)
Operating lease liabilities	(69)	0
Net cash used in operating activities	(16,463)	(15,052)
Cash Flows From Investing Activities:
Proceeds from the sale of the MST Franchise	0	5,000
Proceeds from sale and maturity of marketable securities	37,500	0
Purchases of marketable securities	(22,049)	0
Net cash provided by investing activities	15,451	5,000
Cash Flows From Financing Activities:
Proceeds related to issuance of common stock through at-the-market offerings, net of issuance costs	0	156
Redemption of convertible preferred stock	0	(360)
Withholdings from exercise of options and issuance of shares for stock-based compensation arrangements, net	(7)	(18)
Net cash used in financing activities	(7)	(222)
Decrease in cash, cash equivalents and restricted cash	(1,019)	(10,274)
Cash, cash equivalents and restricted cash at beginning of the period	30,674	30,975
Cash, cash equivalents and restricted cash at end of the period	29,655	20,701
Cash and cash equivalents	29,609	20,634
Restricted cash	46	67
Total cash, cash equivalents and restricted cash	29,655	20,701
Supplementary information on investing and financing activities not involving cash flows:
Issuance of vested shares under employee stock purchase plan	11	29
Accretion of preferred stock	$ 0	$ 149